Scripture says He came in the flesh. The fallen nature of man is what flesh is, so He resided within our nature but Jesus is also God. God is Spirit, Light, and love and is greater than men being the creator of all things.
This is how He overcame our humanity for us in being tempted in all things man is tempted, yet yielded not once to it. And is why faith in His grace freely given is greater than men trying to please Father by obedience to law.
The power of grace (the overcoming One) is always greater than sinful actions when we put our trust in the blood sacrifice of Gods own Son, on the mercy seat before Father in heaven. This being the plan of Father before time is what pleases God, for His blood is a pure innocent life flow for us all. The ungodly.